Improved fruit-jar



UNITED STATES PATENT OFFICE.

THOMAS G. OTTERSONLOF MILLVILLE, NEW JERSEY.

IMPRovED FRUIT-JAR.

Specication forming part of Letters Patent No. 36,853, dated November 4, '1862'.

using them, referring to the drawings, in which the same lettersindicate like parts in each of the gures.

Figure 1 is an elevation of the jar. Fig. 2 is a central section. Fig. 3 shows the under side of the cover.

The nature of my invention and improvements'in airtight jars consists in the combination and arrangement-of devices hereinafter described.

In the accompanying drawings, A is a cylindrical glass jar, made in the form shown in the drawings, or in such other form as will answer the purpose. About three-eighths of an inch below the top I make a collar or flange, B, around the top of the jar. This flange forms a rabbet to receive the packing C, of india-rubber or other materials, upon which packing the edge D of the cover E rests or sits when the jar is closed.

The cover E is made in theform shown in the drawings; `with its lower edge beveled from F, so that the edge D, which is pressed into the packing by the pressure of the air on the outside of the cover, is between an eighth and asiXteenth of an incli wide, as shown in Fig. 3 ofthe drawings.

Making the edge of the cover thin is a very great improvement, as it takes far less pressure on the cover to press it into the gum and make it tight.

Just above the flange B, I make a groove, G, (see Fig. 2,) to receive the inner edge of the packing C, so that as the cover is pressed down it forces the packing into the groove and helps to make it tight. This groove is a very great and important improvement, as it allows a greater width of packing 'inside of the edge of the cover, thereby preventing the pressure on the cover from forcing the pack# ing out from between the cover and the flange.

The ,screw-clamp H may be applied when the jar is filled and hot. After it has cooled the clamp may be removed and applied to another jar.

I believe Ihave described and represented my improvements in air-tight glass jars for preserving fruit and vegetables so as to enable any person skilled in the art to make and use them. y

I will now state what I desire to secure by Letters Patent.

In combination with a glass jar having a rabbet around the top or mouth on the outside, a glass cover shutting over onto the rab bet or the packing on the rabbet, substantially as described.

THOMAS G. OTTERSON. 

